Title:
Process of producing a perforated thermoplastic sheet
Document Type and Number:
United States Patent 3054148

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Inventors:
Frederick, Zimmerli William
Publication Date:
09/18/1962
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Assignee:
Frederick, Zimmerli William
Primary Class:
Other Classes:
425/DIG.037, 264/154
International Classes:
B26F1/26; B44F11/00; B26F1/00
US Patent References:
RE22290
RE23910
1588278Process of producing replicas of textile samples
1821413Method of and means for shaping sheets of celluloid and the like
2032923Process for producing perforate rubber articles
2032935Rubber film or sheet
2055002Process of producing foraminous coated material
2161308Manufacture of goods of spongelike or cellular rubber
2219578Manufacture of medicinal capsules
2354916Method and apparatus for embossing plastic sheet material
2446771Method of imparting surface effects to thermoplastic sheets
2493439
2518565Apparatus for simultaneously producing multiple recesses in plastic sheet material
2567275Apparatus and method of goffering thermoplastic materials
2660757Method and apparatus for producing textured films




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